Help. Negative Pregnancy Test but no period?

Hello All, I am currently not TTC. My cycle is an average of 30 days long, I am on day 35 and still no period, no signs of pregnancy. I took a test 16DPO and one today in the morning (18DPO). Both came out to a BFN. First one was clear blue digital and second one was FRERP. Is there something going on or am I just late? I am not trying to be pregnant atm.